Leather-working machine



F. WAYLAND. LEATHER WORKING MACHINE. APPLICATION man ^Pn.22. 1920.

1,355,437. Patented 00u 12,1920.

3 SHEETS-SHEET l.

F. .WAYLAND. LEATHER- WORKING MACHINE.

APPLICATION FILED APR. 22. 1920.

Patellted Oct. 12, 1920.

3 SHEETS-SHEET 2.

Zara@ www 270067 fraz/ F. WAYLAND.

LEATHER WORKING MACHINE.

APPuATloN msn APR. 22, 1920.

1,355,437. Y Patented (m2121920.

3 SHEETS-SHEET a.

` wise treating skins,

UNITED STATES;

PafrENT l o FFlicE.

FRANK WAYLAND, OF SALEM, .MASSACHUSETTS LEATHER-WORKING MACHINE.

Speccatonof Letters Patent. i `PatentedOct.' 12, 1920.

iippiicationiea Aprii 22, 1920; serial No. 375,781.

stretching, pressing, putting out, and other-V hides and leather andconsists in certain improvements hereinafter described-on machines ofthe general char-.- acter 'illustratedwin Letters Patent of the UnitedStates issued to me Nos. 1,077,207; 1,090,895; 1,131,756; 1,204,914; and

1,214,852. In machines of tlievkind represented by the foregoing patentspinch rolls or feed rolls draw the skins between various forms ofworking elements for stretching, staking, softening, putting out,ironing, glazing or otherwise' working the I skins.

The pinch rolls themselves in certain in-v stances also serve both asfeed rolls and` working lelements. VFor performing `work of this kind itis essential thatvery considerable pressure be exerted onthe skin by thepinch rolls in order `properly `to feed the skin through the machine, tosqueeze Vout the water and' press'the skin, and 'to maintainthenecessary tension on the skin. H itherto, this pressure between thepinch rolls has been'exerted mainly by applying powerto the swingingframe whichvcarries the separable pinch'roll or rolls to force thelatter directly against the positionally fixed roll or rolls. penditureof a large amount of power directly applied to the swinging frame`topush one roller against another. Iiifsome instances the pinchingpressure has lbeen supplemented by additional mechanism "for applying anincreased inal'pressure after the rolls have been brought vintooperative relation.

It is the principal objectof'the present invention to improve k.theconstruction and co-action of the pinch lrolls to attainfhigh pressurebetween the pinch rollswith amore simple and easily operableconstruction and with Vthe expenditure 'of'relatively little power.Other features ofthe invention will be hereinafter described and'moreparticularly pointed out in the claims.

In the accompanying drawings which illust-rate 'one embodiment of theinvention:

This requires the ex-l Figure 1 is a vertical section of such parts ofthe machine as are necessary to 'an understanding of the invention,certain parts being shown in elevation;

Fig. 2 is a front elevation kof, one end of the machine; v

Fig. 3 is an enlarged detail inyend elevation of the top of the machineshowing the separable roll carried by the swinging arm` in openposition; rand Fig. 4 is a-diagrammatic View illustrating one of thepairs of stretching and/tension belts in plan.

The main frame of the machine 1 carries all the working parts and ispreferably constructed of castings. A pair of rocking frames 2, l2, oneat each end of the main frame, are mounted to rock or oscillate on shaft3 which is a driving shaft journaled at its ends at the top of the mainframe.A A gear tkeyedto shaft 3 meshes with gears `5 and 6 keyedrespectively to'shafts`7 and'8.

Shafts 7 and 8 are journaled in the rocking frames 2 2 and carry pinchrolls 9 and A10 whichv extendY between the 'rocking frames. The journalboxes 11 and 12 for shafts 7 and 8 are mounted respectively to slide inways 13 'and 11 inthe rocking 'frames 2 and are pressed downward-andinward by stiff coil compression springs 15 and 16,1the force of whosecompression maybe regulated by adjusting screws 17 and 18 mounted on therocking frames 2 at the ends ofthe slide ways 13 and 14:. The slide ways13 and 14 are'preferably disposed at approximately a right angle toeachother.

The rear shaft 7 extends through and 'be- 'yond-the machine frame andhas fixed to its outer `end a long toothed gear wheel 19 which servesboth as a driving gear and as a finder gear as hereinafter explained.

At each end of the machine just outside of the main frame is a swingingarm 20 pivoted onshaft 23 at the lower part of the machine. Extendingbetween-the upper ends of the two swinging arms 20 is a shaft 21whichcarries pinch roller 22. Shaft' 21 also extends through slot 37 in themachine frame and has fixed to its outer end a long toothed gear 21which meshes withgear 19 when the parts are inoperative position'asshown in' Figs. 1 and 2. The pinch rolls 9, 1O1and 22 maybe -coveredwithmaterials suited tothe workto be y performed. For example n'they maybe-,covered with felt, cloth, or 'rubbenasf desired,

abutments againstbracvkets 29 which are fastened to a cross rod orvshaft 30 extending from side to side ofthe machine.V The workingfaceofthe presser bar is provided with inclined vanes 3 diverging V:from the vcenter of the machine to stretch and work out the skin'laterally in'eachdirection at the i center as it passes between the ,presser bar and thepincharoll 22.-, l A Y Y,

vBelow the pinchmrolls are two pairs of stretching and tension belts,the beltsof'each Y' `pair being mounted end to'end and travelingswinging arms 2O.V The other similar pair of belts with which thefirstpair coperates.V is similarly mounted and drivenkovn a fixed part `ofthe machine frame, one belt of ther in opposite directions from theiradjacent ends. @ne pair .of said belts 32, 33is carried and driven bysprocket wheels 34 mounted on a cross bar35 which extends between vthelatter pair being shown at 36, VFig?. 1. Said belts are substantiallysimilar to those shown in my said LettersPatent No. 1,214,852.- and asneither the belts nor the mechanisms by' which they` aremounted anddriven, form part of the present invention, no further de,- scription ofthem will be necessary.,

The mechanism for operating the swing. ing arms 20, with the'partscarried thereby, to open and close the pinch rollsrrlikewise formsnopart of the present invention and4 V.need not be Y herein described.VAny well known or preferred mechanism for this purpose may be usedVsuch. as that Vrindicatedrin my PatentgNo. l;,()7.7.,207. Suiiice it tosay Y that said swinging arms V20 swing forward to open lnan arcrepresented approximately by theslot- 37 in the machine frame. Y lTheshaftj3 is the driving shaft for the pinch rolls and `may be rotatedfrom any Y suitable source lof power (not shown). When shaft 3 is driveninthe direction of the arrow,'that is in a. clockwise direction asviewed inFig. 1, it will turn shafts 7 and 3 through' gears-'5 and@together with their rolls 9 and 10; in a-counter-clockwise direction asindicated by arrows, and gear 19 on shaft 7 meshing with gear 24 onshaft2`l will turn fthe latterftogether with pinch roll 22 in aclockwise direction. f f

lnoperation, assuming thatfthe swinging frame composed of arms 20 hasbeen swung forward, thefroll 22 will be opened Aor separatedjfrbre the.Otherpinch rolls) as, shown drying, pressing, or putting the fixedmachine frame.

in Fig. 3 and the stretching andtension Abelts 32, 33 will be likewiseseparated from the correspondingopposed belts mounted on Y The skin isVthen laid into the machine behind or on top of the pinch 110117227 andbelts 32, 33,V and the swinging" arms 20 will be swungto operai tive orclosed position as shown in Fig. 1. Y

As the frame 2 is'free torock or oscillate vthe pinch roll 22 willengageboth rolls 9Y and 10 beforeA exerting ,Y any considerable pressure oneither and theiinder gear 24 with long pointed'teethwill readily engageand mesh with theisimilariinder gear 19`on shaft y7. .Y Continuedmovementy of theswing ingyfrani'e causes the several pinch rolls :ict-

ing one upon another vto roll Vinto place, thci so i.

springsrly and 16 compressing as the pressure increases, andtheoscillatingframe2 iinally rockinginto the position shown in Fig. l whenthe pinch roll 22 reaches its iinal working position. This action of theoscil4' V lating frame k2 in conjunction with the swing. farms' 2Oresembles the `action of a toggle joint'exertng-very great pressurebetween the rolls 9, V10,.'and theroll 22 with the expenditure ofcomparatively little power for swinging the roll 22 into place. Theaction of the closing movementfis assistedby the pressureV of the jfrontroll'l0which bears against the following side of the roll22. ywhen thellatter by pressing against roll 9, swings or'rocks the oscillating frame2 It willbe seenthat the principle ofthe toggle joint results fromtheorganizationY andar-` rangement of` parts in such manner that thecomponent Aof the force, applied in a tan-1 gential direction forbringing the Vrolls to working position, exerted radiallyY of therocking frame and the swinging frame rgreatly exceeds the transversecomponent.

When the roll 22 is in closed position it also bears against the presserbar 25 some what compressing the spring 28.

When in working position the downward pressure of the pair of rolls 9and 10 against v the roll 22 is substantially balanced and is exertedapproximatelyV in a line connecting the pivots of the rocking-framef2and the swingingarms 20 so that comparatively little power is requiredtolroll the parts into working position notwithstanding they aresubjected to high pressure one againstthe other. i

The skin is nowvtightly pinchedbetween rolls lO'and 22, rolls y9 and 22,bar 25 and roll 22 and between the stretching and ten-V Y sion belts32,33 andl their corresponding opl posed pair on the fixed frameofthemachine.' The drivingshaft3' beino operated, the pinchA rolls willrfeedA the skin upward and` out .ofthe machine squeezing, pressing,stretching and working it out in conjunction with the presser bar25 andits divergent vll-iet Spread, and Stretchcthe,

' skin-:laterally and Ain conjunction with the npwardby the pinch rolls.

stretching andtension beltswhich not only straightenand stretch the skinlaterallybefore it passes `to the Vpinchfrolls but also put alongitudinal tension on it as itis pulled I claim: Y y

1. A leather working machine comprising azrockingffram'e, pinch rollsjournaled on the rocking frame, and a swinging frame having a pinch rolljournaled at the freeend thereof cooperating with the pinch rolls on therocking frame torock the latter when the swinging frame is `forced intoworking position and to exert high pressure between the coacting pinchrolls, the parts being so organized and arranged that the component ofthe force applied for bringing the rolls to working positionexertedradially of the rocking frame and the swinging frame greatly exceeds thetransverse component, according to the principle of the toggle joint.

2. A leather working machine comprising a rocking frame', pinch rollsjournaled in yielding bearings on the rocking frame, and a swingingframe having a pinch roll journaled at the free end thereof coperatingwith the pinch rolls on the rocking frame to rock the latter when theswinging frame isV forced into working position and to exert highpressure betweenthe coacting pinch rolls, the parts being so organizedand arranged that the component of the force applied for bringing therolls to working position exerted radially of the rocking frame and theswinging frame greatly exceeds the transverse component, according totheprinciple of the toggle joint.

3. A leather working machine comprising a rocking frame, a pair of pinchrolls journaled on the rocking frame, one at each side of the pivot ofthe rocking frame, and a swinging fra-me having a pinch roll journaledat the free end thereof cooperating with the pinch rolls on the rockingframe to rock the latter when the swinging frame is forced into workingposition and to exert high pressure between the coacting pinch rolls,the parts being so organized and arranged that the component of theforce applied for bringing the rolls to working position exertedradially of the working frame and the swinging frame greatly exceeds thetransverse component7 according to the principle of the toggle oint.

4. A leather `working machine comprising a rocking frame, pinch rollsjournaled on the rocking frame7 and a swinging frame having a pinch rolljournaled at the free end thereof coperating with the pinch rolls on therocking frame to rock the latter when the swinging frame is forced intoworking position and to exert high pressure between the coactingpinchfrolls, Iand a presser bar supported on the machine frame below therocking frame,- adapted toengage the pinch roll on the swinging framewhen the latter isclosed, the'fparts beingso organized and arranged'that thercomponent of the forceY applied for bringing the rolls toworking position exerted radially of theV rocking frame 'and theswingingframe greatly exceeds the transverse component, according to theprinciple of the toggle joint.

5. A leather working machine comprising a rocking' frame, pinch rollsjournaled in yielding bearings mounted to slidein ways arranged at anangle to each other on the rocking frame, and a swinging frame havn inga pinch roll journaled at the free end thereof coperating with ,thepinch rolls onthe rocking frame to rock the latter when the swingingframe is forced into working position and to exert high pressure betweenthe coacting pinch rolls, the parts being so organized andarranged thatthe component of the force applied for bringing the rolls to workingposition exerted radially of the rocking frame and the swinging framegreatly exceeds the transverse component, according to the kprinciple ofthe toggle joint.

6. A leather working machine comprising arocking frame, a pair of pinchrolls journaled on the rocking frame, and a swinging frame having apinch roll journaled at the free end thereof cooperating with the pinchrolls on the rocking frame to rock the Vlatter when the swinging frameis forced into working position and to exert pressure between thecoacting pinch rolls,

the front roll on the rocking frame being r adapted tov press on thefollowing side of the roll on the swinging arm during the closingmovement of the latter.

7. A leather working machine comprising a rockin frame, a drive shaft onwhich the rocking rame is pivoted, a pair of pinch rolls journaled onthe rocking frame one at each side of the pivot of the rocking frame,gears fixed to said pinch rolls, a driving gear fixed to the drive shaftand meshing with both gears xed to the pinch rolls, a swinging framehaving a pinch roll journaled at its free end coperating with the pinchrolls on the rocking frame to rock the latter when the rolls are forcedinto working position and to exert high pressure between the coactingpinch rolls, and driving gears connecting said pinch roll on theswinging frame to one of the pinch rolls on the rock frame when theswinging frame is in closed position.

8. A leather working machine comprising a rocking frame, a drive shafton which the rocking frame is pivoted, a pair of pinch rolls journaledon the rocking frame one at each side of the pivot of the rocking frame,

gears fixed to said pinch ro11s,a driving gear fixed tothe drivershaftand-meshing with both gears fixed to thefpinch r011s',a swinging framehaving a pinch roll joun naled at itsl free end coperating with thepinch rolls on the rocking frame to rock the latter when the rolls areVforced into Working position andV to exert high pressure l ybetween`the Coacting pinchro11s, and driv# ing and finder gears havingelongatedteeth 10 connecting said pinch -.ro11 on the'svvinging frame toone ofthe pinch rolls on fthe rock ingi frame'vvhen the closed position.

Signed by me af' Boston, Massachusetts 1.15

swingingV frame is in

